package com.example.demo.customer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Objects;

@Service

public class CustomerService {
    private final CustomerRepo customerRepo;
    @Autowired
   public CustomerService(CustomerRepo customerRepo) {
        this.customerRepo = customerRepo;
    }
    List<Customer> getCustomers() {
        return customerRepo.getCustomers();
    }
    Customer getCustomer(Long id) {
        return getCustomers()
                .stream()
                .filter(customer -> Objects.equals(customer.getId(), id))
                .findFirst()
                .orElseThrow(() -> new IllegalStateException("customer 无法找到"));
    }


}
